As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C BS 1241 WING REAR SPAR LEFT UPPER CHORD FOUND CORROSION AT HOLE NR 9 APPROX 0.030 INCH DEPTH. BS 1241 WING REAR SPAR LEFT UPPER CHORD BOLT HOLE NR 9 CORROSION REMOVED NDT INSPECTED RESULT CORROSION FREE. BOLT HOLE BUSHING REPAIRED AS PER EO B747-5740-17032-A APPENDIX -E-. SEPARATE BUSHING INSTALLED IN INTERNAL SPLICE FITTING AND UPPER CHORD.